Patent US3787512A successfully refreshed from Google Patents.
US3787512A
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Preparation of aromatic hydrocarbons
Assignee: Ethyl Corp
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Filing: 1971-03-10
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Granted: 1974-01-22
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Expires: 1991-03-10
Abstract
Abstract PROCESS FOR ALKYLATING AN AROMATIC HYDROCARBON BY REACTING A HALOALKANE WITH EITHER BENZENE OR AN ALKYL BENZENE AND CONDUCTING THE REACTION IN THE PRESENCE OF AN ALKYLALUMINUM HALIDE CATALYST WITHOUT DELIBERATELY ADDING HEAT TO ELEVATE THE TEMPERATURE OF THE REACTION.
Inventors
- 👤 G Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:17
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/861; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |